The charge is connected with two related contracts within the Middle East entered into in 2013 and ends a long running investigation by the SFO into allegations of bribery.
Helping the SFO with its investigation has already cost the company up to £1m.
Douglas McCormick, CEO of Sweett Group said: “We welcome this development which brings closure on the Middle East legacy issues a step closer allowing the group to progress unencumbered in the future.
“This is an important next step in the strategic turnaround of the business.”
The charge brought under section 7(1) of the UK’s Bribery Act 2010 – “failing to prevent an associated person bribing another to obtain or retain business for the company” does not attract a mandatory debarment from public sector tendering under EU/UK law.